Adult Sunday School: The Larger Catechism 67-68: Effectual Calling February 1, 2015 Jonathan Kamerman Adult Sunday School, Dr. David Booth Adult Sunday School by Dr. David Booth on The Larger Catechism 67-68: Effectual Calling (pdf) Adult Sunday School by Dr. David Booth on The Larger Catechism 67-68: Effectual Calling (Audio 2/1/15) Duration 44:46